Improved mode for attaching diamonds for stone-driliiingt



PATENTED OCT. 19, 1869. H. J. SMITH.

DIAMONDS IPORSTONE DRILLING.

MODE OP ATTAUHING 'lfnverniol JK/W Jwzt M Mmf To all whom it mayconcern:

fiilnited $13M against (Milit a.

HQJ ULIUS SMITH, or BOSTON, MASSACHUSETTS.

Letters Patent N 96,045, dated October 19,1869.

, IMPROVED MODE FOR ATTACH ING- DIAMONDS TOR STONE-DRILLING.

The Schedule referred to in those Letters Patent and making part of thesome Beit known that I, H. J ULrUs SMITH, of Boston, in the county ofSuifolk, audState of Massachusetts, have invented a new and improvedMode of, Setting or Fixing Diamonds in Drill-Heads and other Tools;

' and I dohereby declare the following to be a full and correctdescription of the same, reference beinghad 7 to the accompanyingdrawings, in which-.-

Figure 1 is -a vertical section of a d1il1-head,-with a diamond set init in the mode which I 'use.

perfect contact, in every past, between the metal and the diamond; andthe latter soon becomes loose, and

.falls out.

1f a-number of diamonds are inserted near each other, as is frequentlythe case, the one that first becomes loose is liable to crash orbreakout the others, or-some of them. The common method, mo1eover,isslower and more egrpensive than that which I adopt. I prefer to attachthe diamonds to small plugs or settings, as O, for greater conveniencein i'nsertingand removing them from the heads in which they are designedto be used; but they ean'be inserted singly, or in 'any desired number,by casting the drill-head or tool directly around them, if preferred. Ihave essayed both methods. v v

' Steel, chillediron,'brass,'or other metal, may be used, as may bevfound most desirable; and diamonds set in this .way can be used for thecutting or grinding-poin'ts'or surfaces .of saws, drills, andstone-dressing or turning tools. The casting is done in moulds ofpipe-clay, the diamonds being held in position in any convenient mode.

The pressure is produced by a piston and screw.

The mode of performing the casting, oreflecting the pressure, forms nopartof my invention.

Having thus fully described my invention,

.What I claim, and desire to secureby Letters Patout, is--- lfAdiamond-drill, or other 'tool, in which one or more diamonds areattached, to the metallic head or stock, by castingthe metal, underpressure, upon or around the diamonds, so that they shall be firmlyembedded and held in the metal,'as described.

2. A drill, or other tool, formed by setting or embedding singlediamonds in separate plugsor settings of metal, in the manner described,and screwing or otherwise inserting and fixing suchplugs in the drill.-

' head, or tool, substantially as specified.

The above specification of my said invention signed .and witnessed atBoston, this 17th day oi' Aug'ust,'

H. JULIUS SMITH.

Witnesses:

.SAMUsnO. Moons,

Gnome L. Burris.

